<template>
  <div class="bottom-content">
    <template v-for="(item, index) in panelItems" :key="item">
      <div :class="['item', `panel${item.id}`]">
        <div class="pan-left">
          <div class="title">{{ item.title }}</div>
          <!-- 数据动画 -->
          <span :id="`total-num-${item.id}`" class="number">{{ item.totalNum }}</span>
          <span class="unit">{{ item.unit }}</span>
        </div>
        <div class="pan-right">
          <span :class="['triangle', item.isUp ? 'up-triangle' : 'down-triangle']"></span>
          <!-- 数据动画 -->
          <span :id="`percentage-num-${item.id}`" class="percentage">{{ item.percentage }}</span>
        </div>
      </div>
    </template>
  </div>
</template>

<script setup lang="ts">
import { ref, onMounted, watch, nextTick } from 'vue'
import { CountUp } from 'countup.js'

const props = defineProps({
  panelItems: {
    type: Array<{
      id: number
      title: string
      totalNum: number
      unit: string
      percentage: number
      isUp: boolean
    }>,
    default: function () {
      return []
    },
  },
})

watch(() => props.panelItems, (newV, oldV) => {
  // nextTick 是 Vue.js 中的一个方法，用于在下一次 DOM 更新周期之后执行回调函数。它确保在数据变化后，DOM 已经完成更新时再执行特定操作。
  // 主要功能如下： 1.确保 DOM 更新已完成。 2.提高性能，避免频繁触发 DOM 操作。
  nextTick(() => startAnimation(newV))
})

// onMounted(() => {
//   startAnimation(props.panelItems)
// })

function startAnimation(panelItems = []) {
  panelItems.forEach((item, index) => {
    new CountUp(`total-num-${item.id}`, item.totalNum, {
      duration: 2,
      useGrouping: true,
      separator: ',',
      decimal: '.',
    }).start()
    new CountUp(`percentage-num-${item.id}`, item.percentage, {
      duration: 2,
      useGrouping: false,
      decimal: '.',
      suffix: '%',
    }).start()
  })
}
</script>

<style scoped lang="scss">
.bottom-content {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: row;
  align-items: center;
  /* padding-top: 40px; */
}

.bottom-content .item {
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  align-items: center;
  margin-top: 60px;

  flex: 1;
  height: 100%;
  padding: 0 10px 0 35px;
  /* border: 1px solid red; */
}

.bottom .panel1 {
}

.bottom-content .pan-left {
  font-size: 16px;
  color: #ffffff;
  opacity: 0.8;
}
.bottom-content .pan-left .title {
  color: white;
}
.bottom-content .pan-left .number {
  font-size: 36px;
  font-weight: bold;
  color: #23aeff;
  line-height: 60px;
}

.bottom-content .pan-left .unit {
  font-size: 18px;
  color: #23aeff;
}

.bottom-content .pan-right {
  margin-top: 35px;
}

.bottom-content .panel1 .pan-right .up-triangle {
  display: inline-block;
  margin-bottom: 4px;
  width: 0;
  height: 0;
  border-bottom: 8px solid #c70013;
  border-left: 8px solid transparent;
  border-right: 8px solid transparent;
}
.bottom-content .panel1 .pan-right .percentage {
  color: #c70013;
}
.bottom-content .panel2 .pan-right .up-triangle {
  display: inline-block;
  margin-bottom: 4px;
  width: 0;
  height: 0;
  border-bottom: 8px solid #c70013;
  border-left: 8px solid transparent;
  border-right: 8px solid transparent;
}
.bottom-content .panel2 .pan-right .percentage {
  color: #c70013;
}

.bottom-content .panel3 .pan-right .down-triangle {
  display: inline-block;
  margin-bottom: 1px;
  width: 0;
  height: 0;
  border-top: 8px solid #37a73f;
  border-left: 8px solid transparent;
  border-right: 8px solid transparent;
}
.bottom-content .panel3 .pan-right .percentage {
  color: #37a73f;
}
</style>
